A HUONBROOK woman treated like a sex slave and a punching bag has been awarded an extra $9250 in compensation.

The woman claimed her former de facto partner bashed her regularly over three and a half years, treating her as a sex slave until their relationship ended after a particularly brutal sexual assault in April, 2010.

That attack resulted in a Victims Compensation Fund pay-out for the sexual assault but a second claim relating to the regular beatings and other sexual assaults was refused.

Sydney Civil and Administrative Tribunal senior member John McAteer overturned that refusal on appeal.

"It is claimed that she was hit to the chin, punched in the face and had a chair thrown at her head," he said.

"The applicant gave a history of regular physical and sexual assaults.

"She said the offender treated her like a slave and used her like a sex slave."

A psychological report detailed years of abuse and "being kept hostage" in the years before April, 2009.

"The report also details the presence of psychological harm significantly related to and arising from the violence during the period of the relationship," Mr McAteer said.

"Having considered the following evidence it is clear to me (the woman) has been the victim of an act of violence..."